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Rising frequency of ozone-favorable synoptic weather patterns contributes to 2015-2022 ozone increase in Guangzhou

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journal of Environmental Sciences 2025年第2期148卷 502-514页

作者： Nanxi Liu Guowen he Haolin Wang Cheng he Haofan Wang Chenxi Liu Yiming Wang Haichao Wang Lei Li Xiao Lu Shaojia Fan School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary Key Laboratory of Tropical Atmosphere-Ocean System(Sun Yat-sen University)Ministry of EducationZhuhai 519082China

Objective weather classification methods have been extensively applied to identify dominant ozone-favorable synoptic weather patterns(SWPs),however,the consistency of different classification methods is rarely *** this study,we apply two widely-used objective methods,the self-organizing map(SOM)and K-means clustering analysis,to derive ozone-favorable SWPs at four Chinese megacities in *** find that the two algorithms are largely consistent in recognizing dominant ozone-favorable SWPs for four Chinese *** the case of classifying six SWPs,the derived circulation fields are highly similar with a spatial correlation of 0.99 between the two methods,and the difference in themean frequency of each SWP is less than 7%.The six dominant ozone-favorable SWPs in Guangzhou are all characterized by anomaly higher radiation and temperature,lower cloud cover,relative humidity,and wind speed,and stronger subsidence compared to climatology *** find that during 2015-2022,the occurrence of ozone-favorable SWPs days increases significantly at a rate of 3.2 days/year,faster than the increases in the ozone exceedance days(3.0 days/year).The interannual variability between the occurrence of ozone-favorable SWPs and ozone exceedance days are generally consistent with a temporal correlation coefficient of *** particular,the significant increase in ozone-favorable SWPs in 2022,especially the Subtropical High type which typically occurs in September,is consistent with a long-lasting ozone pollution episode in Guangzhou during September *** results thus reveal that enhanced frequency of ozone-favorable SWPs plays an important role in the observed 2015-2022 ozone increase in Guangzhou.

关键词： Ozone(O3) Objective weather classification methods Synoptic weather patterns Trends Guangzhou

Recycling Fe and improving organic pollutant removal via in situ forming magnetic core-shell Fe_(3)O_(4)@CaFe-LDH in Fe(Ⅱ)-catalyzed oxidative wastewater treatment

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journal of Environmental Sciences 2025年第1期147卷 523-537页

作者： Ting he jie Sun Liangwei Deng jialin Ming Changwei Hu Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengdu 610064China biogas Institute of Ministry of Agriculture and Rural Affairs Chengdu 610041China Inner Mongolia Key Laboratory of Fine Organic Synthesis Inner Mongolia UniversityHohhot 010021China

Due to its high efficiency,Fe(Ⅱ)-based catalytic oxidation has been one of the most popular types of technology for treating growing organic pollutants.A lot of chemical Fe sludge alongwith various refractory pollutantswas concomitantly produced,whichmay cause secondary environmental problemswithout proper *** here innovatively proposed an effective method of achieving zero Fe sludge,reusing Fe resources(Fe recovery=100%)and advancing organics removal(final TOC removal>70%)simultaneously,based on the in situ formation of magnetic Ca-Fe layered double hydroxide(Fe_(3)O_(4)@CaFe-LDH)***(Ca^(2+)and Fe^(3+))concentration(≥30 mmol/L)and their molar ratio(Ca:Fe≥1.75)were crucial to the success of the *** nano Fe_(3)O_(4)was designed to be involved in the Fe(Ⅱ)-catalytic wastewater treatment process,and was modified by oxidation intermediates/products(especially those with COO-structure),which promoted the co-precipitation of Ca^(2+)(originated from Ca(OH)_(2)added after oxidation process)and byproduced Fe^(3+)cations on its surface to in situ generate core-shell Fe_(3)O_(4)@*** oxidation products were further removed during Fe_(3)O_(4)@CaFe-LDH material formation via intercalation and *** applicable to many kinds of organicwastewater,such as bisphenol A,methyl orange,humics,and biogas *** prepared magnetic and hierarchical CaFe-LDH nanocomposite material showed comparable application performance to the recently reported *** work provides a new strategy for efficiently enhancing the efficiency and economy of Fe(Ⅱ)-catalyzed oxidative wastewater treatment by producing high value-added LDHs materials.

关键词： CaFe layered double hydroxide Fe(Ⅱ)-catalytic oxidation Fe recycling Magnetic nanomaterial in situ formation Fe_(3)O_(4)modification

Орtimizing struсturаl раrаmеtеrs оf еlесtrоwеtting triрlе-liquid lеns bаsеd оn jоint simulаtiоn tесhnоlоgy

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Chinese Optics 2025年第1期18卷 78-88页

作者： Huang, Peng Song, Yue Zhou, Fei-Qiang Zhou, Yi-Hang he, Guo-Qiang Xie, Zhong-Yi Zhang, Xin-Long Key Laboratory of Advanced Manufacturing and Automation Тechnology in Guangхi Universities School of Mechanical and Control Engineering Guilin University of Тechnology Guilin541006 China

The electrowetting triple-liquid lens has excellent zoom performance, but its structural complexity and design difficulty are relatively high. Therefore, we propose a method for optimizing the structural parameters of the electrowetting triple-liquid lens based on joint simulation. To design a triple-liquid lens, Comsol and Zemax software are used to establish triple-liquid lens simulation models under different structural parameters, and its focal lengths under different voltages are obtained. The effects of height and taper on zoom range and initial focal length are analyzed, and a set of structural parameters with the maximum zoom range and the longest initial focal length is determined. To verify the method’s reliability, we prepare the triple-liquid lens models with different heights and tapers, and conduct zoom experiments. The simulation and experimental results show that the initial focal length of the triple-liquid lens correlates positively with height and taper;the zoom range correlates positively with taper, but height is the main influencing factor. When the height is 12 mm and the taper is 20°, the lens has the most extensive zoom range and the longest initial focal length. When the taper is less than 15°, the simulation and experimental results are highly consistent. © 2025 Editorial Office of Chinese Optics. All rights reserved.

关键词： Focusing

STCF conceptual design report (Volume 1): Physics & detector

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Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.bai Y.bai O.bakina A.barnyakov V.blinov V.bobrovnikov D.bodrov A.bogomyagkov A.bondar I.boyko Z.H.bu F.M.Cai H.Cai j.j.Cao Q.H.Cao X.Cao Z.Cao Q.Chang K.T.Chao D.Y.Chen H.Chen H.X.Chen j.F.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen Y.Chen Y.Q.Chen H.Y.Cheng j.Cheng S.Cheng T.G.Cheng j.P.Dai L.Y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko j.M.Dias D.Z.Ding L.Y.Dong W.H.Dong V.Druzhinin D.S.Du Y.j.Du Z.G.Du L.M.Duan D.Epifanov Y.L.Fan S.S.Fang Z.j.Fang G.Fedotovich C.Q.Feng X.Feng Y.T.Feng j.L.Fu j.Gao Y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong b.Gou W.Gradl j.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo j.C.Guo j.Guo Y.P.Guo Z.H.Guo A.Guskov K.L.Han L.Han M.Han X.Q.Hao j.b.he S.Q.he X.G.he Y.L.he Z.b.he Z.X.heng b.L.Hou T.j.Hou Y.R.Hou C.Y.Hu H.M.Hu K.Hu R.j.Hu W.H.Hu X.H.Hu Y.C.Hu j.Hua G.S.Huang j.S.Huang M.Huang Q.Y.Huang W.Q.Huang X.T.Huang X.j.Huang Y.b.Huang Y.S.Huang N.Hüsken V.Ivanov Q.P.ji j.j.jia S.jia Z.K.jia H.b.jiang j.jiang S.Z.jiang j.b.jiao Z.jiao H.j.jing X.L.Kang X.S.Kang b.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin Y.Lei E.Levichev C.H.Li C.Li D.Y.Li F.Li G.Li G.Li H.b.Li H.Li H.N.Li H.j.Li H.L.Li j.M.Li j.Li L.Li L.Li L.Y.Li N.Li P.R.Li R.H.Li S.Li T.Li W.j.Li X.Li X.H.Li X.Q.Li X.H.Li Y.Li Y.Y.Li Z.j.Li H.Liang j.H.Liang Y.T.Liang G.R.Liao L.Z.Liao Y.Liao C.X.Lin D.X.Lin X.S.Lin b.j.Liu C.W.Liu D.Liu F.Liu G.M.Liu H.b.Liu j.Liu j.j.Liu j.b.Liu K.Liu K.Y.Liu K.Liu L.Liu Q.Liu S.b.Liu T.Liu X.Liu Y.W.Liu Y.Liu Y.L.Liu Z.Q.Liu Z.Y.Liu Z.W.Liu I.Logashenko Y.Long C.G.Lu j.X.Lu N.Lu Q.F.Lü Y.Lu Y.Lu Z.Lu P.Lukin F.j.Luo T.Luo X.F.Luo Y.H.Luo H.j.Lyu X.R.Lyu j.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas S.Malde D.Matvienko Z.X.Meng R.Mitchell A.Nefediev Y.Nefedov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan Y.Pan E.Passemar Y.P.Pei H.P.Peng L.Peng X.Y.Peng X.j.Peng K.Peters S.Pivovarov E.Pyata b.b.Qi Y.Q.Qi W.b.Qian Y.Qian C.F.Qiao j.j.Qin j.j.Qin L.Q.Qin X.S.Qin T.L.Qiu j.Rademacker C.F.Redmer H.Y.Sang Anhui University Hefei 230039China beihang University Beijing 100191China budker Institute of Nuclear Physics Novosibirsk 630090Russia CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University of Geosciences Wuhan 430074China China University of Mining and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced Study UCASHangzhou 310024China hebei Normal University Shijiazhuang 050024China hebei University Baoding 071002China hefei University of Technology Hefei 230601China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher School of Economy 11 Pokrovsky bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of Automotive Technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University of Science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China jilin University Changch

The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the bEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STCF project in China is under development with an extensive R&D *** document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design

Long-term trends and response of wet ammonia deposition to changes in anthropogenic emissions in the Pearl River delta of China

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journal of Environmental Sciences 2025年第5期151卷 373-386页

作者： Mingyue Li Lyumeng Ye Ming Chang Weihua Chen Shuidi he buqing Zhong Xuemei Wang Guangdong-Hongkong-Macao joint Laboratory of Collaborative Innovation for Environmental Quality Institute for Environmental and Climate ResearchJinan UniversityGuangzhou 511443China South China Institute of Environmental Sciences The Ministry of Ecology and Environment of PRCGuangzhou 510530China Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China

The Pearl River Delta(PRD)region has been identified as a significant hotspot of wet ammonium ***,the absence of long-term monitoring data in the area hinders the comprehension of the historical trends and changes in wet NH_(4)^(+)-N deposition in response to emissions,which interferes with the ability to make effective *** study has analyzed the long-term trends of wet NH_(4)^(+)-N deposition flux and has quantified the effect of anthropogenic emissions and meteorological factors at a typical urban site and a typical forest site in the PRD region from 2009 to *** revealed a significant decreasing trend in wet NH_(4)^(+)-N flux in both the typical urban and forest areas of the PRD region,at-6.2%/year(pbuted 47%–57%of the wet NH_(4)^(+)-N deposition trend over the past 12 years compared to meteorological *** conditions dominated the interannual fluctuations in wet NH_(4)^(+)-N deposition with an absolute contribution of 46%–52%,while anthropogenic emissions change alone explained 10%–31%.NH_(3)emissions have the greatest impact on the urban area among anthropogenic emission factors,while SO_(2)emissions have the greatest impact on the forest ***,precipitation was identified as the primary meteorological driver for both *** findings also imply that the benefits of NH_(3)emissions reductions might not immediately emerge due to interference from weather-related factors.

关键词： Long-term trends Inter-annual variation Wet ammonium deposition Anthropogenic emission change Meteorological condition The Pearl River Delta region

Adaptive Control of a Flexible Manipulator With Unknown Hysteresis and Intermittent Actuator Faults

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IEEE/CAA journal of Automatica Sinica 2025年第1期12卷 148-158页

作者： Shouyan Chen Weitian he Zhijia Zhao Yun Feng Zhijie Liu Keum-Shik Hong School of Mechanical and Electrical Engineering Guangzhou University the School of Control Science and Engineering Shandong University IEEE the College of Electrical and Information Engineering Hunan University the National Engineering Research Center for Robot Visual Perception and Control Technology Hunan University the School of Intelligence Science and Technology University of Science and Technology Beijing (USTB) the Institute for Future the School of AutomationQingdao University the School of Mechanical Engineering Pusan National University

In this study, we consider a single-link flexible manipulator in the presence of an unknown bouc-Wen type of hysteresis and intermittent actuator faults. First, an inverse hysteresis dynamics model is introduced, and then the control input is divided into an expected input and an error compensator. Second,a novel adaptive neural network-based control scheme is proposed to cancel the unknown input hysteresis. Subsequently,by modifying the adaptive laws and local control laws, a fault-tolerant control strategy is applied to address uncertain intermittent actuator faults in a flexible manipulator system. Through the direct Lyapunov theory, the proposed scheme allows the state errors to asymptotically converge to a specified interval. Finally,the effectiveness of the proposed scheme is verified through numerical simulations and experiments.

关键词： Adaptive control flexible manipulator intermittent actuator faults inverse hysteresis dynamics vibration control

Taming of trinitromethyl-oxadiazole to access high density and high oxygen balance via a dual modulation strategy

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Defence Technology(防务技术) 2025年第1期43卷 142-149页

作者： jinya Zhang Teng Fei jingwei Meng jinxiong Cai Lei Zhang Siping Pang Chunlin he School of Materials Science&Engineering Beijing Institute of TechnologyBeijing 100081China Experimental Center of Advanced Materials School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China hongqing Innovation Center Beijing Institute of TechnologyChongqing 401120China

Energetic compounds bearing the trinitromethyl group are garnering broad attraction as potential candidates for a new generation of high energy dense *** this work,an effective dual modulation strategy involving both molecular isomerization and crystal morphology control was employed to design and optimize trinitromethyl-oxadiazole with improved comprehensive *** this dual strategy,3,5-bis(trinitromethyl)-1,2,4-oxadiazole(3)was synthesized,resulting in the formation of two distinct crystal morphologies(needle and sheet)corresponding to two crystal forms(3-a and3-b).Encouragingly,while maintaining ultra-high oxygen balance(21.73%),3 achieves impressive densities(1.97-1.98 g/cm^(3)).To our knowledge,the density of 1.98 g/cm^(3)for 3-a sets a new record among that of nitrogen-rich monocyclic ***,practical crystal morphology prediction was creatively introduced to guide the experimental crystallization conditions of 3,increasing the impact sensitivity and friction sensitivity from 1 j to 80 N(3-a)to 10 j and 240 N(3-b),***,the crystal structural analyses and theoretical calculations were conducted to elucidate the reasons of differences between 3-a and 3-b in density and *** work provides an efficient strategy to enhance performance of trinitromethyl derivatives,broadening the path and expanding the toolbox for energetic materials.

关键词： Energetic materials High oxygen balance High density Dual modulation Trinitromethyl group

Wnt2bb signaling promotes pharyngeal chondrogenic precursor proliferation and chondrocyte maturation by activating Yap expression in zebrafish

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journal of Genetics and Genomics 2025年第2期52卷 220-230页

作者： Xiaojuan Guo Liping Yang Yujie Wang Mengna Yuan Wenqing Zhang Xinyu he Qiang Wang State Key Laboratory of Membrane biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100101China Division of Cell Developmental and Integrative BiologySchool of MedicineSouth China University of TechnologyGuangzhouGuangdong 510006China Innovation Centre of Ministry of Education for Development and Diseases The Sixth Affiliated HospitalSchool of MedicineSouth China University of TechnologyGuangzhouGuangdong 510006China

Pharyngeal cartilage morphogenesis is crucial for the formation of craniofacial *** neural crest cells are specified at the neural plate border,migrate to pharyngeal arches,and differentiate into pharyngeal chondrocytes,which subsequently flatten,elongate,and stack like coins during *** the developmental processes prior to chondrocyte maturation have been extensively studied,their subsequent changes in morphology and organization remain largely ***,we show that wnt2bb is expressed in the pharyngeal ectoderm adjacent to the chondrogenic precursor cells in *** of Wnt2bb leads to a reduction in nuclearβ-catenin,which impairs chondrogenic precursor proliferation and disrupts chondrocyte morphogenesis and organization,eventually causing a severe shrinkage of pharyngeal ***,the decrease ofβ-catenin in wnt2bb^(-/-)mutants is accompanied by the reduction of Yap *** of Yap can restore the proliferation of chondrocyte progenitors as well as the proper size,shape,and stacking of pharyngeal *** findings suggest that Wnt/β-catenin signaling promotes Yap expression to regulate pharyngeal cartilage formation in zebrafish.

关键词： Wnt/β-catenin signaling YAP Wnt2bb Chondrocyte maturation Pharyngeal cartilage Zebrafish

Analysis of convective-radiative heat transfer in dovetail longitudinal fins with shape-dependent hybrid nanofluids: a study using the hermite wavelet method

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Applied Mathematics and Mechanics(English Edition) 2025年第2期46卷 357-372页

作者： C.G.PAVITHRA b.j.GIREESHA S.SUSHMA K.j.GOWTHAM Department of PG Studies and Research in Mathematics Kuvempu University

A distinguished category of operational fluids, known as hybrid nanofluids,occupies a prominent role among various fluid types owing to its superior heat transfer properties. by employing a dovetail fin profile, this work investigates the thermal reaction of a dynamic fin system to a hybrid nanofluid with shape-based properties, flowing uniformly at a velocity U. The analysis focuses on four distinct types of nanoparticles,i.e., Al2O3, Ag, carbon nanotube (CNT), and graphene. Specifically, two of these particles exhibit a spherical shape, one possesses a cylindrical form, and the final type adopts a platelet morphology. The investigation delves into the pairing of these *** examination employs a combined approach to assess the constructional and thermal exchange characteristics of the hybrid nanofluid. The fin design, under the specified circumstances, gives rise to the derivation of a differential equation. The given equation is then transformed into a dimensionless form. Notably, the hermite wavelet method is introduced for the first time to address the challenge posed by a moving fin submerged in a hybrid nanofluid with shape-dependent features. To validate the credibility of this research, the results obtained in this study are systematically compared with the numerical simulations. The examination discloses that the highest heat flux is achieved when combining nanoparticles with spherical and platelet shapes.

关键词： hermite wavelet method radiation convection dovetail fin nanoparticle configuration O351.2